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Autonomous System

AS39686 · Eurofiber Nederland BV

Overview

AS39686 is announced on the Internet: RIPE RIS route collectors currently see 77 IPv4 prefixes and 20 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 210,944 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 77 upstream neighbours (transit providers or peers) and 453 downstream neighbours (customers or networks it carries). Its most visible upstreams are Eurofiber France SAS (AS35625), GTT Communications Inc. (AS3257), and Level 3 Parent, LLC (AS3356). AS39686 was assigned by RIPE NCC, and its registration country is Netherlands.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 8:57 PM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 90.145.0.1, the first address of 90.145.0.0/16. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.

Announced prefixes

IPv4 prefixes (77 prefixes)

PrefixAddresses
2.58.108.0/221,024
31.207.8.0/212,048
31.207.16.0/204,096
37.251.176.0/204,096
37.251.200.0/212,048
37.251.240.0/212,048
45.11.164.0/221,024
45.80.232.0/221,024
46.22.176.0/23512
46.102.148.0/221,024
82.148.192.0/198,192
83.223.53.0/24256
84.53.64.0/1816,384
89.20.160.0/198,192
90.145.0.0/1665,536
90.145.255.0/24256
91.194.8.0/23512
91.198.203.0/24256
91.212.104.0/24256
91.220.123.0/24256
91.234.145.0/24256
93.95.248.0/212,048
93.157.136.0/23512
109.94.144.0/204,096
141.136.16.0/204,096
144.178.64.0/198,192
144.178.96.0/212,048
144.178.108.0/221,024
144.178.112.0/221,024
144.178.120.0/212,048
144.178.192.0/198,192
144.178.224.0/204,096
144.178.240.0/212,048
144.178.248.0/221,024
145.77.128.0/198,192
145.77.240.0/204,096
151.236.144.0/204,096
151.248.48.0/212,048
161.51.64.0/198,192
171.25.217.0/24256
185.30.56.0/24256
185.41.144.0/221,024
185.60.60.0/221,024
185.65.124.0/23512
185.65.125.0/24256
185.92.199.0/24256
185.125.236.0/221,024
185.165.195.0/24256
185.172.4.0/24256
185.172.5.0/24256
185.184.204.0/221,024
185.202.224.0/24256
185.222.232.0/221,024
185.245.21.0/24256
193.34.4.0/221,024
193.41.42.0/24256
193.53.16.0/24256
193.53.18.0/24256
193.53.19.0/24256
193.53.128.0/198,192
193.53.128.0/24256
193.53.137.0/24256
193.53.139.0/24256
193.53.159.0/24256
193.104.129.0/24256
193.105.33.0/24256
193.242.97.0/24256
193.247.198.0/24256
193.247.199.0/24256
194.53.24.0/212,048
194.53.116.0/23512
194.104.28.0/221,024
194.104.113.0/24256
195.68.244.0/24256
195.130.199.0/24256
195.189.20.0/221,024
195.191.230.0/24256

IPv6 prefixes (20 prefixes)

Prefix
2001:67c:18a0::/48
2a00:f620:1::/48
2a01:5620::/29
2a01:9bc0::/29
2a02:120::/29
2a02:fe8::/32
2a02:fe9::/32
2a02:fe9:266::/48
2a04:f840::/40
2a04:f840:1::/48
2a05:b2c4::/31
2a07:3500:11e0::/48
2a07:3501:1010::/46
2a07:3501:1032::/47
2a07:3501:1060::/48
2a07:3502:10e0::/48
2a07:3502:11c0::/48
2a07:3502:1210::/46
2a0e:4980::/32
2a10:dac0:102::/48

Neighbours

Upstreams (transit or peers) (77)

ASNetworkVisibility
AS35625Eurofiber France SAS6,979
AS3257GTT Communications Inc.4,507
AS3356Level 3 Parent, LLC4,502
AS6939Hurricane Electric LLC2,358
AS33891Core-Backbone GmbH471
AS6461Zayo Bandwidth328
AS25091IP-Max SA309
AS200020Stichting NBIP-NaWas263
AS5405Inter.link GmbH253
AS34019Hivane Association233
AS37497Network Platforms (PTY) LTD229
AS50629LWLcom GmbH223
AS34927iFog GmbH222
AS9002RETN Limited201
AS35280F5 Networks SARL177
AS50673Serverius Holding B.V.172
AS47147Anexia Cloud Solutions GmbH168
AS12637SEEWEB s.r.l.167
AS15576NTS workspace AG167
AS8298IPng Networks GmbH165
AS14840BR.Digital Telecom156
AS20764CJSC RASCOM154
AS34177Celeste SAS151
AS48362Stadtwerke Feldkirch145
AS3935131173 Services AB144
AS42708Glesys AB141
AS61049Exascale Ltd138
AS1103SURF B.V.137
AS12779IT.Gate S.p.A.137
AS3214-134

The 30 most visible of 77.

Downstreams (customers) (453)

ASNetworkVisibility
AS205185Eurofiber Cloud Infra B.V.2,137
AS35625Eurofiber France SAS1,997
AS209871Infomedics Infomedics BV872
AS212157baten-lastendienst Logius849
AS50309Arcadiz Telecom NV782
AS34663Belastingdienst629
AS211856De Nederlandsche Bank N.V.624
AS51647Gemeente Amsterdam470
AS203396Ministerie van Economische Zaken453
AS60941Fujitsu Technology Solutions BV415
AS48037-396
AS198687-393
AS42383-383
AS206436-376
AS196987-371
AS208655-365
AS204319-362
AS202553-359
AS14445-351
AS213160-349
AS214689-347
AS3216PJSC "Vimpelcom"338
AS215020-338
AS210372-332
AS214406-331
AS201189IRC Engineering NV326
AS47780-312
AS30844Liquid Telecommunications Ltd307
AS200911-302
AS203860-301

The 30 most visible of 453.

114 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.

Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.

How to read this page

An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.

A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.

Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.

The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.

Frequently asked questions

How do I find the ASN of an IP address?
Type the address in the BGP viewer: it shows the prefix that covers it, the AS that originates that prefix and the paths seen towards it. A traceroute also names the network of each hop, so you can see every AS a connection crosses.
Why does one company have several ASNs?
Large operators split their network by region, by activity or by history: a cloud may use one number for its backbone and another for a region, and every acquisition brings its own numbers. Each number has its own page, with its own prefixes and neighbours.
Why do prefix counts differ from one site to another?
Each source sees the routing table from different collectors, at a different time, and counts differently: some include prefixes withdrawn in recent weeks, some merge a block and its pieces. This page counts the prefixes RIPE RIS collectors see originated by the network at the end of the latest two-week window, and counts each IPv4 address once.
Is this the list of IP ranges of a cloud provider?
It is what its networks announce, which is what the Internet routes to them. Many providers also publish an official list of ranges per service and region; that list is the reference for firewall rules, because a range can be announced before it is used, or announced by another of their AS numbers.